.bookcontentbox {
  position: fixed;
  left: 100%;
  top: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--artback-color);
  overflow-y: scroll;
  z-index: 41;
}
.bookcontentbox.show {
  left: 0;
}
.bookcontentbox .bigflexbox {
  overflow-x: hidden;
  display: flex;
}
.bookcontentbox .bigflexbox .dragbox {
  display: flex;
}
.bookcontentbox .bigflexbox .dragbox .realcontent {
  padding: 16px;
  columns: calc(100vw - 32px) 1;
  column-gap: 16px;
  height: 100vh;
  font-size: 18px;
  line-height: 3;
  color: var(--font-color);
}
